There are many techniques to synthesized nano material, one of the versatile methods for synthesis of nonmaterial utilizing bottom up approach of nanotechnology. It involves heating of source material in a tubular furnace at high temperature in presence of some carrier gas flow, so that nanosized particles of source material are allowed to condense over substrate surface placed at some distance away from the source in downward flow direction. The nanostructure formed over the substrate surface strongly depends on temperature of the substrate and nature of the substrate. The pressure inside the tube, carrier gas, rate of flow of carrier gas, distance between source and substrate can also affect the microstructure of the products. Cu doped tin oxide nanowire has been successfully synthesized by thermal evaporation method.H₂S Gas sensing has been investigated by this Cu doped tin oxide. In this study, Cu doped SnO₂ nanowire has been grown on silicon substrate by thermal evaporation process. The morphological, structural properties of nanowire have been investigated systematically using scanning electron microscopy, x-ray diffraction.

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